async def get_token_for_install(*, installation_id: str) -> str:
"""
https://developer.github.com/apps/building-github-apps/authenticating-with-github-apps/#authenticating-as-an-installation
"""
token = installation_cache.get(installation_id)
if token is not None and not token.expired:
return token.token
app_token = generate_jwt(
private_key=conf.PRIVATE_KEY, app_identifier=conf.GITHUB_APP_ID
)
throttler = get_thottler_for_installation(
# this isn't a real installation ID, but it provides rate limiting
# for our GithubApp instead of the installations we typically act as
installation_id=APPLICATION_ID
)
async with throttler:
res = await http.post(
f"https://api.github.com/app/installations/{installation_id}/access_tokens",
headers=dict(
Accept="application/vnd.github.machine-man-preview+json",
Authorization=f"Bearer {app_token}",
),
)
assert res.status_code < 300
token_response = TokenResponse(**res.json())
installation_cache[installation_id] = token_response
return token_response.token
async def __aenter__(self) -> Client:
self.throttler = get_thottler_for_installation(
installation_id=self.installation_id
)
return self